Casting apparatus



Oct. 20, 1925- G. K. THOMPSON CASTING APPARATUS 2 sheets-sheet 1 Filed Aug. 31, 1923 Ere. Z7

Gap/ye A. 777009760 Armwvzv Oct. 20, 1925- G. K. THOMPSON CASTING APPARATUS 2 Sheets-Sheet 2 Filed Aug. 31, 1923 W n/r05 680(96' A. Mam 2:011

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Patented Get. 20, 1925.

PATENT DFFICE.

GEORGE K. 'rnomrson, or sumivrrr, NEW JERSEY.

CASTING APPARATUS.

Application filed August 31, 1923.

1 0 all whom it may concern:

Be it known that I, GEORGE. K, THOMPSON, a citizen of the United States of America, a resident of Summit, in the county of Union, State of New Jersey, have invented certain new and useful Improvements in Casting Apparatus, of which the following is a full, clear, and exact description, reference being bad to the accompanying drawings, forming part of this specification.

This invention relates to improvements in casting apparatus, and the novel features are adapted for use in making castings from lead and other metals having low melting points, although it is to be understood that the invention is not limited to such use.

One of the objects is to produce a mold made of sections that can be easily and quickly positioned for use, and thereafter readily separated to expose the casting. Another object is to provide a simple and effective means for releasing the casting from the apparatus. A further object is to produce an apparatus of this kind adapted to produce castings having ribs that would prevent their withdrawal from an ordinary mold.

I/Vith the foregoing and other objects in view, the invention comprises the novel construction, combination and arrangement of parts hereinafter more specifically described and illustrated in the accompanying drawings wherein is shown the preferred embodiment of the invention. However, it is to be understood that the invention comprehends changes, variations and modifications which 7 come within the scope of the claims hereunto appended. 1

Fig. I is a side elevation of an apparatus embodying the features of this invention.

Fig. II is an end view.

Fig. III is a vertical section.

Fig. IV is a horizontal section taken through the upper portion of the mold and showing the top of the casting therein.

1 designates a base with a core 2 extending upwardly therefrom, The core may be hollow and formed integral with the base. In the apparatus shown, the casting is a rectangular container A which is shown inverted on the core, the latter being rectangular in cross-section to form the inner face of the casting. The bottom wall of the casting A Serial N0. 660,267.

contacts with the top face of the core, and the side walls contact with the sides of the core.

The core is surrounded by a pair of mold sections B, each having side wall members extending about halfway around the sides of the corev and meeting at the lines 4: in Figs. II and IV. Each mold section. is also provided with an end wall member 5 extending over and separated from the upper end of the core. These wall members 5 contact with each other at the line 1 III) which forms a continuation of the line 4:.

As an illustration of suitable means to admit molten metal to the mold, funnels 6 are shown with their reduced ends between the adjacent edges of mold sections B, and vent tubes 7 are also arranged between these edges.

The mold sections B are hinged to the base by means of pivot pins 8 passing through cars which extend upwardly from the base and also through legs 9 extending downwardly and outwardly from the mold sections. These pivots lie at opposite sides of the core and they permit eachmold section to swing in an arc of a circle toward and away from the core. When the mold sections B contact with each other, they may be locked by means of latch bars (Figs. I and II), each of said bars being pivoted at 11 to one of said sections and provided with a head 12 having an inclined face adapted to engage a corresponding incline on a keeper 13 secured to the other mold section.

Attention is now directed to the ribs formed on 1 the casting A. Longitudinal ribs 14 are formed by grooves in the upper face of core 2. External ribs 15 are formed by grooves in the sides and top of the mold members 13. Vertical ribs 16 are formed by grooves at the meeting edges of the mold members, and horizontal ribs 17 are formed by grooves in the sides of the mold members which lie adjacent to the pivots S. A study of the ribs in connection with the pivots 8 will show that the mold sections will pass freely from the ribbing when said sections are moved away from each other on their pivots 8.

C designates a thrust member in the form of a rectangular frame surrounding and closely fitting the core, said thrust memher being in Contact with the lower edges of mold sections B, so as to close the space between the core and mold sections. The thrust member thus forms part of the mold and it engages the lower edge of the casting. This member can be forced upwardly to release the casting from the core.

The means for operating the thrust member (1 comprises feet 9 (Fig. III) extending from the legs 9 of the -mold sections and located below the oppositely disposed side bars-of the thrust member. These feet support the thrust member, and when the mold sections are moved away from each other, said feet 9 move upwardly 'to-elevate the thrust member, thereby releasing the 'ng 1 om the mold. This is an important feature. especially in the manufacture of softmctal castings which are liable to be distorted unless carefully removed from the core.

To prevent binding of the thrust member U when it is elevated on the core, and to avoid binding of the casting on the core, as well as to prevent a distortion that might occur if the mold sections were not simul taneousiy released from the core, the apparatus preferably includes a means to prevent independent movement'of the mold sections. To illustrate this feature, I have shown a pair of segmental gears 20 at each end of .the mold, each gear being secured to one of the mold sections B so as tomesh with its companion gear on the other mold section. The teeth of each gear lie concentric with the pivot 8 of the mold section to which the gear is secured. These gears provide for the transmission of motion from one mold section B to the other, so as to insure simultaneous movement of the mold sections. Consequently, both halves of the mold will be released from the casting at the same time, and the feet 9 which lie below opposite sidesof thrust member (1 will be elevated at the same time. The latter feature insures a true vertical movement of the thrust member C.

I claim:

'1. A mold comprising a support provided with core, mold sections hinged to said support and movable toward and away from said core, andoperating means whereby .motion is transmitted from one of said mold sections to the other, so as to prevent independent movement of said sections, said operating means comprising cooperating memberssecured directly to said mold sections.

2. A mold comprising a support provided with core, mold sections hinged to said support and movable toward and away from said core, and operating means whereby motion is transmitted from one of said mold sections to the other, so as to prevent independent movement of said sections, said operating means comprising toothed gears concentric with the hinges.

3. mold comprising a core, mold section separated from said core to provide a space for the casting, said mold sections being movable toward and away from the core, and releasing means whereby the casting is-released from the core, said releasing means being engaged and adapted to be moved by portions of said movable mold sections.

-l. A mold comprising a core, mold sections separated from said core to provide a space for the casting, said mold sections being movable toward and away from the core, and releasing means whereby the casting is released from the core, said releasing means including a thrust member entirely closing the space between said mold sections and the core at one-end of said space.

5. A mold comprising a core, mold sections separated from said core to provide a space for the casting, said mold sections being movable toward and away from the core, and releasing means whereby the casting is released from the-core, said releasing means including a thrust member closing the space between said mold sections and the core-,andsaid thrust member'being movable with said mold sections to release the casting while said mold sections are moving a *ay from the core.

6. A mold comprising a support provided with a core, mold sections hinged to said support and separated from said core to provide a space for the casting, a thrust member closing said space, said hingedmold sections being movable toward and away from the core, and means whereby motion is transmitted from said mold sections to said thrust member, so as to release the casting from the core.

7. A mold comprising a support provided with a core, mold sections hinged to said support and separated from said core .to provide a space for the casting, a thrust member surrounding said core and closing said space, the thrust member being movable relative to the core to release ithe casting therefrom, and means whereby motion is transmitted from the hinged mold sections to said thrust member.

8. A mold comprising a'support provided with a core, mold sections hinged to said support and separated from said core to provide a space for the casting, a thrust member surrounding said core and closing said space, the thrust member being movable relative to the 'core to release the casting therefrom, and :means whereby motion is transmitted from the hinged mold sections to said thrust membensaid means including operating members extending from the hinges of said mold sections.

9. A mold comprising a support provided with a core, mold sections hinged to said support and separated from said core to provide a space for the casting, a thrust member surrounding said core and closing said space, the thrust member being movable relative to the core to release the casting therefrom, and means whereby motion is transmitted from the hinged mold sections to said thrust member, said means including operating members extending from the hinges of said mold sections, and said operating members being arranged at opposite sides of the core to simultaneously cooperate with opposite sides of said thrust member.

10. A mold comprising a core, movable mold sections separated from said core to provide a space for the casting, and releasing means whereby the casting is released vfrom the core, said releasing means including a thrust device having thrust elements arranged at opposite sides of the core and adapted to engage an edge of the casting,

and operating means movable with said movable mold sections whereby motion is simultaneously transmitted to said thrust elements.

v 11. A mold comprising a core, mold sec tions separated from said core to provide a space for the casting, and releasing means whereby the casting is released from the core, said releasing means includingathrust device having thrust elements arranged at opposite sides of the core and adapted to engage an edge of the casting, and operating means whereby motion is simultaneously transmitted to said thrust elements, said operatii'ig means comprising hinges supporting said mold sections, gearing whereby motion is transmitted from one of said mold sections to the other, and operating elements extending from said hinges and engaging said thrust elements.

In testimony that I claim the foregoing I hereunto affix my signature.

GEORGE K. THOMPSON. 

